12-24-2021, 08:35 AM
(This post was last modified: 12-24-2021, 09:20 AM by rich2005.
Edit Reason: typo
)
You can change Alpha representation from checks to plain in Edit -> Preferences -> Display Check style and Check size
The lighter grey is transparency
The darker grey comes from Edit -> Preferences -> Image Wiondows -> Apperance where you can set a Custom padding colour.